How does the DLC "work"?

[Tengen Toppa]

And by "work" I mean, how and where can I access it?

Hi, new player here. Got the game from Humble last month, and am excited to play.
Since the game is mostly procedurally generated content, where does the DLC show up?

I know that one DLC is a separate campaign, and thus accesed there, but the other DLC (swamps of corus is the name?) is mostly "new areas, bosses, weapons and events".
Do these new things just "sprinkle" here and there in already established content (i.e an area already in the game, that now has a larger pool of things to generate), or is it a seperate thing, like the campaign one, where all of the content is "tucked to the side" to consume whenever you please (I like to play DLC stuff after main game stuff, cuz I believe the game was balanced like that).

TL;DR: Where DLC?

[Dio Aloke]

The Swamps of Corsus DLC is integrated in the main campaign (Among the Ashes). It's the 3rd world you go to (but you can skip it). As you progress through the campaign you'll naturally find it.
After that, it's available in Adventure Mode, in which you can roll a specific world and get a smaller version of it compared to the campaign. It's great for farming or if you're for a specific item/boss, plus there are some exclusive things to this mode and stuff that changes based on your decisions in the campaign

Originally posted by Tengen Toppa:

(I like to play DLC stuff after main game stuff, cuz I believe the game was balanced like that).

It's seamlessly integrated in the game and wouldn't play without it to be honest. It just brings so much good stuff and is one of my favorite worlds/stories